Hi, some update:
I received today a FTDI USB cable (see below the dmesg of the RPI)
I slew to an object and the tracking has now been running for 2 hours without any failure!!!
Thanks you very mush STASH for your suggestion!!!

dmesg
[334932.601293] usb 1-1.2: new full-speed USB device number 5 using dwc_otg
[334932.728768] usb 1-1.2: New USB device found, idVendor=0403, idProduct=6001
[334932.728789] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[334932.728802] usb 1-1.2: Product: FT232R USB UART
[334932.728814] usb 1-1.2: Manufacturer: FTDI
[334932.728826] usb 1-1.2: SerialNumber: A50285BI
[334933.920049] usbcore: registered new interface driver ftdi_sio
[334933.920112] usbserial: USB Serial support registered for FTDI USB Serial Device
[334933.920262] ftdi_sio 1-1.2:1.0: FTDI USB Serial Device converter detected
[334933.920369] usb 1-1.2: Detected FT232RL
[334933.923480] usb 1-1.2: FTDI USB Serial Device converter now attached to ttyUSB0
[335001.991928] usb 1-1.3: new high-speed USB device number 6 using dwc_otg
[335002.095577] usb 1-1.3: New USB device found, idVendor=04a9, idProduct=3145
[335002.095597] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0

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